The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28-45mm F1.8 and the Leica SL 50mm f2 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 28-45mm F1.8 is the longer of the two lenses at 151mm. The Leica SL 50mm f2 ASPH with a length of 83mm, is 68mm shorter. Besides being longer, the Sigma 28-45mm F1.8 also has a larger diameter of 88mm compared to the Leica SL 50mm f2 ASPH's 75mm diameter.
Below you can find a scaled side-by-side image of Sigma 28-45mm F1.8 and Leica SL 50mm f2 ASPH to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 28-45mm F1.8 and the Leica SL 50mm f2 ASPH Size and Weight The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Leica SL 50mm f2 ASPH weighs 402g, 58% (558g) lighter than the Sigma 28-45mm F1.8's weight of 960g.
Filter Threads
The Sigma 28-45mm F1.8 has a filter size of 82mm whereas the Leica SL 50mm f2 ASPH has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Sigma 28-45mm F1.8:
And these are the 67mm filters that we recommend for the Leica SL 50mm f2 ASPH:
Lens Mounts
Both the Sigma 28-45mm F1.8 and the Leica SL 50mm f2 ASPH has the same Leica L lens mount . Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE .
Focal Range
Sigma 28-45mm F1.8 has a focal range of 28-45mm and
1.6X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 67.5mm .
On the other hand, the Leica SL 50mm f2 ASPH is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 75mm .
